SwiftKey has launched a major update to its Android platform, dropping its $4 price tag making the popular keyboard app free for all users. The company has decided to embrace the in-app purchasing model by introducing a free app that includes themes can cost $0.99 for one, $2.99 for five, or $4.99 for a pack of 10. Other new features include an upgraded default theme (“Cobalt” has been replaced by “Nickel”), emoji prediction, a built-in number row, and an ever-growing prediction engine.